U.S. patent number 8,012,085 [Application Number 11/478,709] was granted by the patent office on 2011-09-06 for method for collecting/transporting a medical capsule and endoscopic apparatus for the method.
This patent grant is currently assigned to Fujifilm Corporation, SRJ Corporation. Invention is credited to Mamoru Machiya, Katsuaki Ohashi, Hironori Yamamoto.
United States Patent |
8,012,085 |
Yamamoto , et al. |
September 6, 2011 |
Method for collecting/transporting a medical capsule and endoscopic
apparatus for the method
Abstract
The present invention provides a method for
collecting/transporting a medical capsule by holding the medical
capsule using an endoscopic apparatus comprising: an endoscope
having an inserting section to be inserted in a body cavity with a
distal end including an observation section to observe a subject
and an suction opening; a sucking device in communicated with the
suction opening; and a generally cylindrical hood member which is
attached to the distal end of the inserting section, the method
comprising: a sucking step of making an inside of the hood member
vacuum by actuating the sucking device to suck the inside of the
hood member through the suction opening; and a holding step of
attracting and holding the medical capsule to the hood member
sucked by the sucking step.
Inventors: |
Yamamoto; Hironori (Tochigi,
JP), Ohashi; Katsuaki (Saitama, JP),
Machiya; Mamoru (Saitama, JP) |
Assignee: |
SRJ Corporation (Tochigi,
JP)
Fujifilm Corporation (Tokyo, JP)
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Family
ID: |
37162406 |
Appl.
No.: |
11/478,709 |
Filed: |
July 3, 2006 |
Prior Publication Data
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Document
Identifier |
Publication Date |
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US 20070015961 A1 |
Jan 18, 2007 |
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Foreign Application Priority Data
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Jul 15, 2005 [JP] |
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2005-207535 |
Sep 26, 2005 [JP] |
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2005-278438 |
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Current U.S.
Class: |
600/127; 600/156;
600/129; 600/102 |
Current CPC
Class: |
A61B
1/00147 (20130101); A61B 1/041 (20130101); A61B
1/273 (20130101); A61B 1/31 (20130101) |
Current International
Class: |
A61B
1/04 (20060101); A61B 1/00 (20060101); A61B
1/12 (20060101) |
Field of
Search: |
;600/102,115,129,127,156,128 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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55-29338 |
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Mar 1980 |
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JP |
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56-143804 |
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Oct 1980 |
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JP |
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8-131397 |
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May 1995 |
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JP |
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11-104063 |
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Apr 1999 |
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JP |
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2004-194976 |
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Jul 2004 |
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JP |
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2004-305505 |
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Nov 2004 |
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JP |
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2004-358222 |
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Dec 2004 |
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JP |
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WO-99/32028 |
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Jul 1999 |
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WO |
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WO-2005/053517 |
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Jun 2005 |
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WO |
|
Other References
Hiraga, Takehito, JP2004-305505 (Machine Translation into English),
Publication Date: Apr. 11, 2004, Detailed Description pp. 1-9 and
Drawings pp. 1-6, and Patent Abstract of Japan page (retrieved Sep.
18, 2009 from www4.ipdl.inpit.go.jp/. cited by examiner .
JP Office Action issued on Mar. 8, 2011 in Japanese Application No.
2005-278436. cited by other.
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Primary Examiner: Dvorak; Linda C
Assistant Examiner: Nia; Alireza
Attorney, Agent or Firm: Birch, Stewart, Kolasch &
Birch, LLP
Claims
What is claimed is:
1. A method for collecting/transporting a medical capsule by
holding the medical capsule using an endoscopic apparatus which has
an endoscope having an inserting section to be inserted in a body
cavity with a distal end including an observation section to
observe a subject and a suction opening, a sucking device in
communication with the suction opening, and a generally cylindrical
hood member which is attached to the distal end of the inserting
section, wherein the hood member is a generally cylindrical member
having: at least two internal areas of a base end side internal
space area and a distal side internal space area in a direction of
an insertion shaft of an inserting section, and a distal end with
an outer circumferential surface of the hood member is formed with
a plurality of grooves which extend along a longitudinal direction
of the hood member, and each of the grooves is provided at
intervals along a circumferential direction of the hood member, the
method comprising: an attaching step of fitting and attaching the
distal end of the insertion section to the base end side internal
space area in a direction from the base end towards the distal end
along the insertion shaft, a sucking step of storing the medical
capsule into the distal side internal space area in a direction
from the distal end towards the base end along the insertion shaft
and actuating to suck the inside of the distal side internal space
area that stored the medical capsule via the suction opening to
make in said inside a low pressure vacuum; and a holding step of
attracting and holding the medical capsule to the hood member
sucked by the sucking step, wherein said grooves allow the distal
end of the hood member to be deflected for holding the medical
capsule.
2. An endoscopic apparatus, comprising: an endoscope having an
inserting section to be inserted in body cavity with a distal end
including an observation section to observe a subject and a suction
opening; a sucking device in communication with the suction
opening; and a generally cylindrical hood member which is attached
to the distal end of the inserting section, wherein the hood member
is a generally cylindrical member having at least two internal
areas of a base end side internal space area and a distal side
internal space area in a direction of an insertion shaft of the
inserting section, and a distal end with an outer circumferential
surface of the hood member is formed with a plurality of grooves
which extend along a longitudinal direction of the hood member, and
each of the grooves is provided at intervals along a
circumferential direction of the hood member, the base end side
internal space area is an attaching section to fit and attach the
distal end of the insertion section in a direction from the base
end to the distal end along an insertion shaft, and the distal side
internal space area is a holding section to attract and hold a
medical capsule when storing the medical capsule in a direction
from the distal end towards the base end along the insertion shaft,
wherein said grooves allow the distal end of the hood member to be
deflected for holding the medical capsule, and wherein the sucking
device is actuated to suck the inside of the distal side internal
space area that stored the medical capsule via the suction opening
to make said inside a low pressure vacuum.
3. The endoscopic apparatus according to claim 2, wherein the hood
member is configured to hold a medical capsule with at least a part
of the medical capsule being pulled into the inside of the hood
member.
4. The endoscopic apparatus according to claim 2, wherein at least
a part of the hood member is transparent or semitransparent.
5. The endoscopic apparatus according to claim 3, wherein at least
a part of the hood member is transparent or semitransparent.
6. The endoscopic apparatus according to claim 2, further
comprising: a first expandable and contractible balloon which is
mounted to an outer circumferential surface of a distal end of the
inserting section; an insertion assisting tool into which the
inserting section is inserted to be guided in a body cavity; and a
second expandable and contractible balloon which is mounted to an
outer circumferential surface of the insertion assisting tool.
7. The endoscopic apparatus according to claim 3, further
comprising: a first expandable and contractible balloon which is
mounted to an outer circumferential surface of a distal end of the
inserting section; an insertion assisting tool into which the
inserting section is inserted to be guided in a body cavity; and a
second expandable and contractible balloon which is mounted to an
outer circumferential surface of the insertion assisting tool.
8. The endoscopic apparatus according to claim 4, further
comprising: a first expandable and contractible balloon which is
mounted to an outer circumferential surface of a distal end of the
inserting section; an insertion assisting tool into which the
inserting section is inserted to be guided in a body cavity; and a
second expandable and contractible balloon which is mounted to an
outer circumferential surface of the insertion assisting tool.
9. The endoscopic apparatus according to claim 5, further
comprising: a first expandable and contractible balloon which is
mounted to an outer circumferential surface of a distal end of the
inserting section; an insertion assisting tool into which the
inserting section is inserted to be guided in a body cavity; and a
second expandable and contractible balloon which is mounted to an
outer circumferential surface of the insertion assisting tool.
10. The endoscopic apparatus according to claim 2, wherein the
holding section includes a distal end of the hood member having an
inner circumferential surface which has a curved portion
corresponding to a curved shape of the medical capsule.
11. The endoscopic apparatus according to claim 2, wherein the
holding section is configured to include a distal end of the hood
member which is formed thinner than any other parts of the hood
member.
12. The endoscopic apparatus according to claim 2, wherein the
holding section is configured to include a distal end of the hood
member having an inner circumferential surface in which a groove is
formed in the circumferential direction.
13. The endoscopic apparatus according to claim 1, wherein a
plurality of the grooves are provided in a direction along a
central axis of the hood member with ribs being formed between the
grooves.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method for
collecting/transporting a medical capsule and an endoscopic
apparatus for the method, in particular, a method for holding a
medical capsule in lower gastrointestinal tract such as small
intestine or colon to collect or transport it and an endoscopic
apparatus for the method.
2. Description of the Related Art
In recent years, as endoscopes for medical use, various types of
capsule endoscopes containing miniature cameras have been
developed. Because such capsule endoscopes are wireless, patient
discomfort can be decreased compared to the case with an endoscope
in which an inserting section of the endoscope is also inserted in
his/her body cavity.
A medical capsule such as a capsule endoscope is generally expected
to be naturally extruded out of a body cavity, but there is a need
to collect the medical capsule at a predetermined position in a
body cavity. Also, a medical capsule often gets stuck at a narrow
portion of a body cavity, which requires a procedure to find the
medical capsule to hold it in order to collect it or to bring it
beyond the narrow portion. Moreover, in recent years, there has
been a need to transport a medical capsule to a predetermined
position in body cavity so that an observation can be started from
the position. In these various applications, it is necessary to
hold a medical capsule in a body cavity.
Then, various endoscopic apparatuses having a function to hold a
medical capsule in a body cavity have been developed. For example,
an endoscopic apparatus disclosed in Japanese Patent Application
Laid-Open No. 2004-194976 has an inserting section with a distal
end formed with a suction opening to suck and hold a medical
capsule therein.
The endoscopic apparatus disclosed in Japanese Patent Application
Laid-Open No. 2004-194976, however, attracts and holds a medical
capsule having an outer diameter of usually on the order of 10 mm
in a suction opening thereof having a small inner diameter of 2 to
4 mm, which means the endoscopic apparatus does not have a enough
power to hold a capsule, and the medical capsule can be fallen.
The endoscopic apparatus disclosed in Japanese Patent Application
Laid-Open No. 2004-194976 has another problem that even if a held
medical capsule is fallen, the falling is not recognizable because
the endoscopic apparatus holds the capsule at a position which is
unlikely to be within a range for observation and it is difficult
to check the capsule visually, and the fallen medical capsule has
to be located again.
In addition, as the endoscopic apparatus disclosed in Japanese
Patent Application Laid-Open No. 2004-194976 is generally in the
form of string of scope, it cannot easily reach the inside of lower
gastrointestinal tract such as small intestine to collect or
transport a medical capsule.
The present invention is made in view of the above problems, and
one object of the present invention is to provide a method for
collecting/transporting a medical capsule which reliably holds a
medical capsule in body cavity to collect or transport, and an
endoscopic apparatus for the method.
SUMMARY OF THE INVENTION
To achieve the above object, a first aspect of the present
invention provides a method for collecting/transporting a medical
capsule by holding the medical capsule using an endoscopic
apparatus comprising: an endoscope having an inserting section to
be inserted in a body cavity with a distal end including an
observation section to observe a subject and a suction opening; a
sucking device in communicated with the suction opening; and a
generally cylindrical hood member which is attached to the distal
end of the inserting section, the method comprising: a sucking step
of making an inside of the hood member vacuum by actuating the
sucking device to suck the inside of the hood member through the
suction opening; and a holding step of attracting and holding the
medical capsule to the hood member sucked by the sucking step.
According to the first aspect of the present invention, the inside
of a hood member is sucked through a suction opening to make the
inside of the hood member vacuum so that a medical capsule can be
attracted to and held by the hood member, thereby the medical
capsule can be held by the hood member having a larger opening than
the suction opening. Thus, a larger holding power for a medical
capsule is obtained, and a medical capsule can be reliably held
with it.
According to the first aspect of the present invention, as a
medical capsule is held by a hood member, the held medical capsule
can be observed by an observation section of an endoscope.
To achieve the above object, a second aspect of the present
invention provides an endoscopic apparatus, comprising: an
endoscope having an inserting section to be inserted in body cavity
with a distal end including an observation section to observe a
subject and an suction opening; a sucking device in communicated
with the suction opening; and a generally cylindrical hood member
which is attached to the distal end of the inserting section,
wherein the hood member has a holding section to attract and hold a
medical capsule when the sucking device is actuated to suck the
inside of the hood member through the suction opening to make the
inside of the hood member vacuum.
According to the second aspect of the present invention, the hood
member can hold a medical capsule at the holding section thereof.
Thus, a medical capsule is reliably held, which prevents the
medical capsule from falling.
According to the second aspect of the present invention, as a
medical capsule is held by a hood member, the held medical capsule
can be observed by an observation section of an endoscope.
A third aspect of the present invention according to the second
aspect provides an endoscopic apparatus, wherein the hood member is
configured to hold a medical capsule with at least a part of the
medical capsule being pulled into the inside of the hood member.
The configuration to hold a medical capsule with at least a part of
the medical capsule being pulled into the inside of the hood member
increases a holding power, which can reliably prevent the medical
capsule from falling.
A fourth aspect of the present invention according to the second
aspect or the third aspect provides an endoscopic apparatus,
wherein at least a part of the hood member is transparent or
semitransparent. According to the fourth aspect of the present
invention, because at least a part of the hood member is
transparent or semitransparent, view is not restricted while the
endoscopic apparatus is inserted to find a medical capsule, and
even when the hood member holds a medical capsule, the outside of
the hood member can be observed by the observation section.
A fifth aspect of the present invention according to any one of the
second aspect to the fourth aspect provides an endoscopic
apparatus, further comprising: a first expandable and contractible
balloon which is mounted to an outer circumferential surface of the
distal end of the inserting section, an insertion assisting tool
into which the inserting section is inserted to be guided in a body
cavity; and a second expandable and contractible balloon which is
mounted to an outer circumferential surface of the insertion
assisting tool.
The fifth aspect of the present invention provides a double balloon
endoscopic apparatus, and this type of endoscopic apparatus makes
it possible to hold a medical capsule at an inside of lower
gastrointestinal tract such as small intestine.
A sixth aspect of the present invention according to any one of the
second aspect to the fifth aspect provides an endoscopic apparatus,
wherein the holding section is configured to include a distal end
of the hood member having an inner circumferential surface which
has a curved portion corresponding to a curved shape of the medical
capsule.
According to the sixth aspect of the present invention, as the
curved portion corresponding to a curved shape of the medical
capsule is formed at an inner circumferential surface of a distal
end of the hood member, the vacuum hood member has an increased
airtightness so that the hood member and the medical capsule are
attracted more closely to each other, which in turn increased the
power to hold the medical capsule. This allows a medical capsule to
be reliably held at the holding section of the hood member.
A seventh aspect of the present invention according to any one of
the second aspect to the fifth aspect provides an endoscopic
apparatus, wherein the holding section is configured to include a
distal end of the hood member which is formed thinner than any
other parts of the hood member.
According to the seventh aspect of the present invention, as the
thinner distal end of the hood member is flexible, the hood member
and a medical capsule are attracted closely to each other even when
the hood member approaches the medical capsule at an angle. In this
way, the increased airtightness of the vacuum hood member improves
the power to hold the medical capsule, which allows a medical
capsule to be reliably held at the holding section of the hood
member.
A eighth aspect of the present invention according to any one of
the second aspect to the fifth aspect provides an endoscopic
apparatus, wherein he holding section is configured to include a
distal end of the hood member having an inner circumferential
surface in which a groove is formed in the circumferential
direction.
According to the eighth aspect of the present invention, as the
groove in the inner circumferential surface of the distal end of
the hood member makes the distal of the hood member flexible, the
closeness between the hood member and a medical capsule is not
reduced even when the hood member approaches the medical capsule at
an angle. In this way, the increased airtightness of the vacuum
hood member improves the power to hold the medical capsule, which
allows a medical capsule to be reliably held at the holding section
of the hood member.
A ninth aspect of the present invention according to any one of the
second aspect to the fifth aspect provides an endoscopic apparatus,
wherein the holding section is configured to include a distal end
of the hood member having an outer circumferential surface in which
a groove is formed.
According to the ninth aspect of the present invention, as the
groove in the outer circumferential surface of the distal end of
the hood member makes the distal of the hood member flexible, the
closeness between the hood member and a medical capsule is not
reduced even when the hood member approaches the medical capsule at
an angle. In this way, the increased airtightness of the vacuum
hood member improves the power to hold the medical capsule, which
allows a medical capsule to be reliably held at the holding section
of the hood member.
A tenth aspect of the present invention according to the ninth
aspect provides an endoscopic apparatus, wherein there are a
plurality of the grooves in a direction along a central axis of the
hood member with ribs being formed between the grooves.
According to the tenth aspect of the present invention, the grooves
in a direction along the central axis of the hood member makes the
distal end flexible, and the rib makes the distal end appropriately
rigid.
According to the present invention, the inside of a hood member is
sucked through a suction opening to make the inside of the hood
member vacuum so that a medical capsule can be attracted to and
held by the hood member, thereby the medical capsule can be
reliably held by the hood member without falling. Also according to
the present invention, as a medical capsule is held by a hood
member, the held medical capsule can be observed by an observation
section of an endoscope.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a system configuration diagram of an endoscopic apparatus
according to the present invention;
FIG. 2 is a perspective diagram to show a distal end of an
inserting section of an endoscope and a hood member;
FIG. 3 is a cross sectional diagram to show a distal end of an
inserting section of an endoscope and a hood member;
FIG. 4 is a cross sectional diagram to show a distal end of an
inserting section of an endoscope with a hood member being mounted
to;
FIG. 5 is a cross sectional diagram to show a hood member which is
approaching a medical capsule at an angle;
FIG. 6A to 6J are diagrams to illustrate a method to operate an
endoscopic apparatus according to the present invention;
FIG. 7 is a cross sectional diagram to show a hood member having a
different configuration from that of FIG. 4;
FIG. 8 is a cross sectional diagram to show the hood member of FIG.
7 which is approaching a medical capsule at an angle;
FIG. 9 is a cross sectional diagram to show a hood member having a
different configuration from that of FIG. 7;
FIG. 10 is a cross sectional diagram to show the hood member of
FIG. 9 which is approaching a medical capsule at an angle;
FIG. 11 is a perspective diagram to show a hood member having a
different configuration from that of FIG. 2;
FIG. 12 is a cross sectional diagram to show a hood member having a
different configuration from that of FIG. 4;
FIG. 13 is a cross sectional diagram to show a hood member having a
different configuration from that of FIG. 12;
FIG. 14 is a perspective diagram to show a hood member having a
different configuration from that of FIG. 2; and
FIG. 15 is a side view of the hood member of FIG. 14.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Now, a preferred embodiment of a method for collecting/transporting
a medical capsule and an endoscopic apparatus for the method
according to the present invention will be described in detail with
reference to the accompanying drawings.
FIG. 1 is a system configuration diagram to show an embodiment of
an endoscopic apparatus according to the present invention. As
shown in FIG. 1, an endoscopic apparatus generally comprises an
endoscope 10, an insertion assisting tool 70, and a balloon
controlling device 100.
The endoscope 10 comprises a hand-held control section 14 and an
inserting section 12 connected to the hand-held control section 14
to be inserted into a body cavity. The hand-held control section 14
is connected to a universal cable 16 having an end which is
provided with a LG connector 18. The LG connector 18 is removably
coupled to a light source device 20 which sends an illumination
light to an illumination optical system 54 which will be explained
below (see FIG. 2). The LG connector 18 is connected to an electric
connector 24 via a cable 22, the electric connector 24 being
removably coupled to a processor 26.
To the hand-held control section 14, an air and water supply button
28, a suction button 30, a shutter button 32, and a function switch
button 34 are arranged in a line, and a pair of angle adjustment
knobs 36 are also provided therewith. The hand-held control section
14 has a rear end in which an air inlet for balloon 38 is formed
with a pipe which is bent into an L shape. A supply or suction of
fluids such as air through the air inlet for balloon 38 makes a
first balloon 60 expanded or contracted, which will be explained
below.
The inserting section 12 consists of a soft portion 40, a curved
portion 42, and a distal end portion 44, starting from the
hand-held control section 14, and the curved portion 42 is remotely
controlled by turning the angle adjustment knobs 36 at the
hand-held control section 14. This control allows the distal end
portion 44 to be directed to a desired direction.
As shown in FIG. 2, the distal end portion 44 has a front surface
45 where an observation optical system 52, an illumination optical
system 54, an air and water supply nozzle 56, and a forceps port
(corresponds to a suction opening) 58 are provided.
A prism 53 is mounted to the back of the observation optical system
52 as shown in FIG. 3, so that a light path of a light from a
subject obtained through the observation optical system 52 is bent
downward by the prism 53. Below the prism 53 is disposed a CCD 55
which is supported by a substrate 57, and the light from a subject
which was bent by the prism 53 is focused on a light sensitive
surface of the CCD 55. Then the light from a subject is converted
into an electrical signal by the CCD 55 to be transmitted through a
signal cable 59. The signal cable 59 is inserted through into the
inserting section 12, the hand held control section 14, the
universal cable 16 and the like of FIG. 1 to be extended to the
electric connector 24 which is connected to the processor 26. Thus,
an observation image which is obtained by the observation optical
system 52 is focused on a light sensitive surface of the CCD 55 to
be converted into an electrical signal, which is output through a
signal cable 59 to the processor 26 where the electrical signal is
converted into an image signal. In this way, a picture image from
observation is displayed on a monitor 50 which is in connection
with the processor 26.
Behind the illumination optical systems 54 of FIG. 2, light guides
(not shown) are disposed with the outputting ends thereof. The
light guides are inserted through into the inserting section 12,
the hand held control section 14, the universal cable 16 and the
like of FIG. 1 to dispose the inputting ends thereof in the LG
connector 18. Thus, when the LG connector 18 is coupled to the
light source device 20, an illumination light irradiated from the
light source device 20 is transmitted through the light guides to
the illumination optical systems 54 to be irradiated forward from
the illumination optical systems 54.
The air and water supply nozzle 56 of FIG. 2 is in communicated
with a valve (not shown) which is controlled by the air and water
supply button 28 of FIG. 1, and the valve is in turn in
communicated with an air and water supply connector 48 which is
provided in the LG connector 18. The air and water supply connector
48 is connected with an air and water supply device (not shown) to
supply air or water. Thus, an actuation of the air and water supply
button 28 causes air or water to be ejected from the air and water
supply nozzle 56 toward the observation optical system 52.
The forceps port 58 of FIG. 2 is in communicated with a pipe 61
which is supported by a distal end portion body 65 of FIG. 3, and
the pipe 61 is in turn coupled with a tube 63. The tube 63 is
inserted through into the inserting section 12 of FIG. 1 to be in
communicated with a forceps inserting section 46. When a procedure
tool such as a forceps is inserted into from the forceps inserting
section 46, the procedure tool can be pulled out from the forceps
port 58. The tube 63 of FIG. 3 is diverged along its way to be in
communicated with a valve (not shown) which is controlled by the
suction button 30 of FIG. 1, and the valve is in turn connected
with a suction connector 49 of the LG connector 18. The suction
connector 49 is connected with a suction pump (corresponds to a
suction device) 51. Thus, an actuation of the suction pump 51 and
an operation of the valve by the suction button 30 causes body
fluid, air, and the like to be sucked through the forceps port
58.
Reference numeral 67 in FIG. 3 designates a cap mounted on the
distal end surface of the distal end portion body 65, and reference
numeral 69 designates a covering member which covers an outer
circumferential surface of the inserting section 12.
As shown in FIG. 2, to the outer circumferential surface of the
inserting section 12, a first balloon 60 is attached which is made
of a resilient material such as rubber. The first balloon 60 is
formed into a generally tubular shape having two deflated ends, and
after the inserting section 12 is inserted through into the first
balloon 60 and the first balloon 60 is disposed at a desired
position, fixing rubber rings 62 are fit onto the both ends of the
first balloon 60 so that the first balloon 60 is fixed around the
inserting section 12.
An air vent 64 is formed in the outer circumferential surface of
the inserting section 12 where the first balloon 60 is attached.
The air vent 64 is in communicated with the air inlet for balloon
38 which is provided in the hand held control section 14 of FIG. 1.
The air inlet for balloon 38 is connected to the balloon
controlling device 100 via a tube 110. Thus, a supply or sucking
air by the balloon controlling device 100 allows the first balloon
60 to be expanded or contracted. The first balloon 60 is expanded
into a generally spherical shape by air supply, and is contracted
to stick around the outer circumferential surface of the inserting
section 12 by air suction.
Meanwhile, the insertion assisting tool 70 shown in FIG. 1
comprises a tubular and rigid holding section 72 which is provided
at the rear end of the insertion assisting tool 70 and a tube body
73 which is attached to the distal end of the holding section 72,
and the inserting section 12 of the endoscope 10 above described is
inserted from the holding section 72 into the tube body 73.
The tube body 73 comprises a flexible resin tube substrate which is
formed of urethane for example, and the substrate has an outer
circumferential surface and an inner circumferential surface which
are coated by a hydrophilic coating material (a lubricant coating
material). The hydrophilic coating material may be, for example,
polyvinyl pyrrolidone.
A second balloon 80 is attached near the distal end of the tube
body 73. The second balloon 80 is formed into a tubular shape
having two deflated ends, and is attached to the tube body 73 with
the insertion assisting tool 70 being therethrough, and is fixed
there by winding a thread (not shown) around the ends. The second
balloon 80 is in communicated with a tube 74 which is adhered to
the outer circumferential surface of the insertion assisting tool
70, and the tube 74 has a rear end to which a connector 76 is
provided. The connector 76 is connected to a tube 120, and to the
balloon controlling device 100 via the tube 120. Thus, a supply or
sucking air by the balloon controlling device 100 allows the second
balloon 80 to be expanded or contracted. The second balloon 80 is
expanded into a generally spherical shape by air supply, and is
contracted to stick around the outer circumferential surface of the
insertion assisting tool 70 by air suction.
The insertion assisting tool 70 has a rear end in which an inlet 78
is formed. The inlet 78 is in communicated with an opening (not
shown) which is formed in the inner circumferential surface of the
insertion assisting tool 70. Thus, a lubricant (e.g. water) can be
supplied into the insertion assisting tool 70 by injecting the
lubricant with a syringe or the like from the inlet 78. This
reduces the friction between the inner circumferential surface of
the insertion assisting tool 70 and the outer circumferential
surface of the inserting section 12 in inserting of the inserting
section 12 into the insertion assisting tool 70, and enables a
smooth relative movement between the inserting section 12 and the
insertion assisting tool 70.
The balloon controlling device 100 supplies and sucks in fluids
such as air through the first balloon 60, and also supplies and
sucks in fluids such as air to and from the second balloon 80. The
balloon controlling device 100 generally comprises a device body
102 and a hand held switch 104 for remotely controlling.
The device body 102 has a front side where a power switch SW1, a
stop switch SW2, a first pressure indicator 106, a second pressure
indicator 108, a first function stop switch SW3, and a second
function stop switch SW4 are provided. Each of the first pressure
indicator 106 and the second pressure indicator 108 is a panel to
indicate a pressure value of the first balloon 60 and the second
balloon 80 respectively, and the pressure indicators 106 and 108
indicate an error code in the event of failure such as a balloon
burst.
The first function stop switch SW3 and the second function stop
switch SW4 turn on and off the functions of the control system for
endoscope A and the control system for insertion assisting tool B
which will be described below, respectively, and when only one of
the first balloon 60 and the second balloon 80 is used, one of the
function stop switches SW3 and SW4, not in use, is controlled to be
turned off. In the turned off control system A or B, any supply and
suction of air is completely stopped, and the pressure indicator
106 or 108 for the system is also turned off. The initial
conditions of the systems may be set by turning off both of the
function stop switches SW3 and SW4. For example, a calibration for
an atmosphere pressure is performed by holding down all of the
switches SW5 to SW9 simultaneously on the hand held switch 104
while both of the function stop switches SW3 and SW4 are turned
off.
To the front of the device body 102 are connected an air supply and
suction tube 110 and an air supply and suction tube 120, for the
first balloon 60 and the second balloon 80 respectively. Backflow
prevention units 112 and 122 are provided at the points where each
of the tubes 110 and 120 is connected to the device body 102, which
prevent any backflow of body fluid when the first balloon 60 or the
second balloon 80 is burst. The backflow prevention units 112 and
122 are respectively structured by fitting a filter for gas and
liquid separation into the inside a hollow disk-like case (not
shown) which is removably attached to the device body 102, so that
the filter prevents any liquid flowing into the device body
102.
The pressure indicators 106 and 108, the function stop switches SW3
and SW4, and the backflow prevention units 112 and 122 are fixedly
arranged for the endoscope 10 and for the insertion assisting tool
70. That is, the pressure indicator 106, the function stop switch
SW3, and the backflow prevention unit 112 are arranged for the
endoscope 10 on the right side relative to the pressure indicator
108, the function stop switch SW4, and the backflow prevention
units 122 for the insertion assisting tool 70, respectively.
Meanwhile, to the hand held switch 104, a stop switch SW5 which is
similar to the stop switch SW2 on the device body 102, an ON/OFF
switch SW6 to give a command to pressurize/depressurize the first
balloon 60, a pose switch SW7 to maintain a pressure of the first
balloon 60, an ON/OFF switch SW8 to give a command to
pressurize/depressurize the second balloon 80, and a pose switch
SW9 to maintain a pressure of the second balloon 80 are provided,
and the hand held switch 104 is electrically connected to the
device body 102 via a code 130. Also, display sections to display a
condition of air supply or exhaust of the first balloon 60 and
second balloon 80, which are not shown in FIG. 1, are provided to
the hand held switch 104.
The balloon controlling device 100 configured as described above
expands each balloon 60 and 80 by supplying air, and maintains the
expanded balloons 60 and 80 by controlling the air pressure in the
balloons at a constant value. The balloon controlling device 100
also contracts each balloon 60 and 80 by sucking air, and maintains
the contracted balloons 60 and 80 by controlling the air pressure
in the balloons at a constant value.
The balloon controlling device 100 is connected to a balloon
exclusive monitor 82 which displays a pressure value and an
expanded or contracted condition of each balloon 60 and 80. A
pressure value and an expanded or contracted condition of each
balloon 60 and 80 may be displayed on the monitor 50 by
superimposing on an observation image obtained by the endoscope
10.
As shown in FIG. 2, a hood member 200 is applied to the distal end
portion 44 of the inserting section 12 of the endoscope 10. The
hood member 200 is formed of a resin or rubber into a cylindrical
shape. As shown in FIG. 3, the hood member 200 has an inner
diameter d which is generally the same with or slightly smaller
than the outer diameter of the distal end portion 44, thereby the
hood member 200 is applied to the distal end portion 44 by
elastically deforming a rear end of the hood member 200C to fit the
hood member 200 onto the distal end portion 44.
The hood member 200 has an opening at its distal end having an area
larger than the opening area of the forceps port 58 in the distal
end portion 44. The shape of the hood member 200 is not limited to
a cylinder, and the hood member 200 may be formed into any shape
such as a tapered shape. However, the opening at the distal end of
the hood member 200 is preferably larger than the opening area of
the forceps port 58.
The hood member 200 has an inner circumferential surface having a
position defining project 202 is formed to define a minimum
projecting length of the hood, and the position defining project
202 contacts with the front surface of the inserting section 12
when the hood member 200 is attached to the distal end portion 44.
This maintains the hood member 200 in a position projected from the
distal end portion 44 when the hood member 200 is attached to the
distal end portion 44. The position defining project 202 defines a
minimum projecting length of the hood, the length may be increased
as needed by an operator.
The hood member 200 has a distal end portion 200A and a middle
portion 200B, and the distal end portion 200A is formed of a
material which is more flexible than that for the middle portion
200B. Thus, the distal end portion 200A of the hood member 200
elastically deforms when a medical capsule 220 is attracted by the
vacuum inside of the hood member 200 to the distal end portion 200A
of the hood member 200, which allows the medical capsule 220 to be
reliably held. That is, as shown in FIG. 4, when the medical
capsule 220 is attracted to the hood member 200 with the
longitudinal sides of the medical capsule 220 being generally
parallel to the central axis of the hood member 200, the inner
circumferential part of the distal end portion 200A of the hood
member 200 elastically deforms to reliably hold the medical capsule
220. As shown in FIG. 5, when the medical capsule 220 is attracted
to the hood member 200 at an angle, the distal end portion 200A of
the hood member 200 elastically deforms along the medical capsule
220, which can increase an airtightness to reliably hold the
medical capsule 220. In this way, the hood member 200 of this
embodiment is configured to have the distal end portion 200A as a
holding section to hold the medical capsule 220.
The middle portion 200B is formed of a material which is less
flexible than that of the distal end portion 200A, thereby the
middle portion 200B of the hood member 200 keeps its original
cylindrical shape when the inside of the hood member 200 is vacuum
(or in a depressurized state). This prevents any crash of the
middle portion 200B of the hood member 200, which in turn prevents
the medical capsule 220 from falling.
At least the middle portion 200B of the hood member 200 is formed
of a transparent or semitransparent material. Thus, view is not
restricted while the hood member 200 is inserted in a body cavity
to find the medical capsule 220, and when the medical capsule 220
is held at the distal end portion 200A of the hood member 200, the
outside of the hood member 200 can be observed through the
transparent or semitransparent middle portion 200B. The entire of
the hood member 200 may be formed of a transparent or
semitransparent material.
Now, a method to insert the inserting section 12 of the endoscopic
apparatus which is configured as described above into a body cavity
will be explained with reference to FIGS. 6A to 6J. FIGS. 6A to 6J
show an example to insert an endoscopic apparatus by oral route,
but the endoscopic apparatus may be inserted by anal route.
First, the first balloon 60 and the second balloon 80 are
contracted and the inserting section 12 is inserted into the
insertion assisting tool 70 to start the insertion of the inserting
section 12. As shown in FIG. 6A, when the distal end of the
inserting section 12 reaches the inside of stomach 90A, the
insertion assisting tool 70 is inserted along the inserting section
12, so that, as shown in FIG. 6B, the distal end of the insertion
assisting tool 70 reaches the inside of the stomach 90A.
Next, while holding the insertion assisting tool 70 so as not to be
pulled out of the body cavity, the inserting section 12 is inserted
into the insertion assisting tool 70 until the distal end of the
inserting section 12 reaches the second portion of duodenum 90B as
shown in FIG. 6C (an inserting operation). Then the first balloon
60 is expanded to fix the distal end of the inserting section 12 to
the second portion of duodenum (a fixing operation).
Then the insertion assisting tool 70 is pushed down to be inserted
along the inserting section 12 (a pushing operation). As shown in
FIG. 6D, after the distal end of the insertion assisting tool 70
comes close to the first balloon 60, the second balloon 80 is
expanded by supplying air. This fixes the second balloon 80 to the
second portion of duodenum 90B, which holds the second portion of
duodenum 90B around the insertion assisting tool 70 via the second
balloon 80 (a holding operation).
In this holding state, both of the insertion assisting tool 70 and
the inserting section 12 are drawn back (a drawing back operation).
This removes any excess deflection or bending between the entrance
and the second portion of duodenum 90B of the gastrointestinal
tract 90.
Next, after the air in the first balloon 60 is sucked to contract
the first balloon 60 as shown in FIG. 6E, the inserting section 12
is inserted into the small intestine 90C (an inserting operation).
Because any excess deflection or bending between the entrance and
the second portion of duodenum 90B of the gastrointestinal tract 90
is already removed by the insertion assisting tool 70, the
inserting section 12 can be readily inserted.
Next, as shown in FIG. 6F, the first balloon 60 is expanded to fix
the distal end of the inserting section 12 to the gastrointestinal
tract 90 (a fixing operation). After the second balloon 80 is
contracted, as shown in FIG. 6G, the insertion assisting tool 70 is
pushed down to be inserted along the inserting section 12 (a
pushing operation), so that the distal end of the insertion
assisting tool 70 comes close to the first balloon 60 to expand the
second balloon 80 (a holding operation).
Then, as shown in FIG. 6H, while the first balloon 60 and the
second balloon 80 are expanded, both of the insertion assisting
tool 70 and the inserting section 12 are drawn back (a drawing back
operation). This removes any excess deflection or bending of the
gastrointestinal tract 90.
This series of operations described above (an inserting operation,
a fixing operation, a pushing operation, a holding operation, and a
drawing back operation) is repeatedly performed, and as a result,
the gastrointestinal tract 90 which has been complicatedly bent or
deflected is made simplified as shown in FIG. 6I. This allows the
inserting section 12 to be inserted further into the
gastrointestinal tract 90 as shown in FIG. 6J.
Now, operations of the endoscopic apparatus according to the
present invention will be explained. An example is shown below in
which a medical capsule 220 in a body cavity is held to be
collected at outside of the body cavity.
First, the inserting section 12 is inserted into a body cavity with
a hood member 200 being attached to the distal end portion 44 of
the inserting section 12. For example, operations such as those
described with FIGS. 6A to 6J are performed to insert the distal
end portion 44 of the inserting section 12 into a lower
gastrointestinal tract such as small intestine.
Then, the distal end portion 44 of the inserting section 12 is
inserted to a position where a medical capsule 220 is located, the
distal end portion 200A of the hood member 200 is brought close to
the medical capsule 220 in the body cavity while observing image
obtained by the observation optical system 52.
The suction button 30 is controlled to start a sucking through the
forceps port 58. This causes the gas (or liquid) in the hood member
200 to be sucked through the forceps port 58, and the inside of the
hood member 200 is made vacuum.
Due to the vacuum inside of the hood member 200, the medical
capsule 220 is attracted to the distal end portion 200A of the hood
member 200. As the distal end portion 200A of the hood member 200
is formed of a flexible material, the medical capsule 220 is
reliably attracted to and held by the distal end portion 200A of
the hood member 200, in spite of a posture of the medical capsule
220. Also, as the medical capsule 220 is attracted to and held by
the distal opening of the hood member 200 the area of which is
larger than that of the forceps port 58, the medical capsule 220 is
reliably held with a larger holding power. In addition, the medical
capsule 220 is held with a part of the medical capsule 220 being
pulled into the inside of the hood member 200, which increases
closeness due to increased airtightness between the medical capsule
220 and the hood member 200, so that the holding power for the
medical capsule 220 is increased. Thus, the medical capsule 220 can
be more reliably held.
After the medical capsule 220 is held, the inserting section 12 of
the endoscope 10 is withdrawn out of the body cavity to bring the
medical capsule 220 to the outside of the body cavity and collect
it. During this operation, as the medical capsule 220 is held in a
region where can be observed by the observation optical system 52,
the holding of the medical capsule 220 can be continuously checked
visually from an observation image. Thus, in case of the medical
capsule 220 being fallen, the situation would be immediately
known.
During the withdrawing of the inserting section 12 of the endoscope
10 out of the body cavity, as the middle portion 200B of the hood
member 200 is transparent or semitransparent, the outside of the
hood member 200 can be observed. This prevents the held medical
capsule 220 from being stuck to a wall surface and the like of the
body cavity.
As described above, according to the endoscopic apparatus of this
embodiment, the inside of the hood member 200 is sucked through the
forceps port 58 to be vacuum, so that a medical capsule 220 is
attracted to and held by the distal end portion 200A of the hood
member 200. Because the distal end portion 200A of the hood member
200 has an opening the area of which is larger than that of the
forceps port 58, the distal end portion 200A has a larger power to
hold the medical capsule 220. So, according to this embodiment, the
medical capsule 220 can be reliably held and collected without
falling.
According to this embodiment, because the medical capsule 220 is
held by the hood member 200, the held medical capsule 220 can be
continuously checked visually from an observation image obtained by
the observation optical system 52.
The configuration of the holding section in the hood member 200 is
not limited to the above embodiment, but the holding section in the
hood member 200 may be configured in any way which is appropriate
to hold a medical capsule 220. For example, a hood member 206 shown
in FIG. 7 includes a distal end portion 206A and a middle portion
206B, the distal end portion 206A having a thickness smaller than
that of the middle portion 206B so that the distal end portion 206A
is easily deflected. So, as shown in FIG. 8, even when the hood
member 206 approached the medical capsule 220 at an angle, the
distal end portion 206A of the hood member 206 is deflected to
closely contact with the medical capsule 220. This increases
closeness due to increased airtightness between the medical capsule
220 and the hood member 206, so that the holding power for the
medical capsule 220 is increased. Thus, the medical capsule 220 can
be reliably held. The middle portion 206B of the hood member 206 of
FIG. 7 and FIG. 8 is formed thicker than the distal end portion
206A with an inner circumferential surface of the middle portion
206B being projecting inward, and the middle portion 206B also
functions as a positioning element when it contacts with the front
surface 45 of the inserting section 12. The thick middle portion
206B keeps its original cylindrical shape even when the inside of
the hood member 206 is sucked vacuum. This prevents the attracting
power from being decreased due to a crash of the middle portion
206B, which in turn prevents the medical capsule 220 from
falling.
A hood member 208 shown in FIG. 9 has a distal end portion 208A and
a middle portion 208B, and a groove 208D is formed between the
distal end portion 208A and the middle portion 208B. The groove
208D is annularly formed in an inner circumferential surface of the
hood member 208 in a circumferential direction thereof. The groove
208D of this configuration reduces the rigidity of the distal end
portion 208A of the hood member 208, which allows the distal end
portion 208A to be easily deflected. This increases closeness due
to increased airtightness between the medical capsule 220 and the
distal end portion 208A of the hood member 208, so that the holding
power for the medical capsule 220 is increased. Thus, the medical
capsule 220 can be reliably held. Especially, as shown in FIG. 10,
even when the hood member 208 approaches the medical capsule 220 at
an angle, the distal end portion 208A of the hood member 208 is
deflected to closely contact with the medical capsule 220, thereby
the medical capsule 220 can be reliably held.
A hood member 210 shown in FIG. 11 includes a distal end portion
210A having an outer circumferential surface provided with a
plurality of grooves 210E. Each of the grooves 210E is formed in an
axis direction of the hood member 210, and has a circular cross
section which is perpendicular to the axis direction. The grooves
210E are separated by a uniform distance from each other in the
circumferential direction, and ribs 210F are formed between the
grooves 210E. The grooves 210E allow the distal end portion 210A of
the hood member 210 to be easily deflected, and the ribs 210F allow
the distal end portion 210A of the hood member 210 to maintain its
appropriate rigidity. In addition, the grooves 210E formed in the
outer circumferential surface make the inner circumferential
surface smooth which readily contacts closely with a medical
capsule 220. This increases closeness between the medical capsule
220 and the hood member 210, so that the medical capsule 220 can be
more reliably held.
A hood member 212 shown in FIG. 12 includes a distal end portion
212A having an inner circumferential surface which is formed to
correspond to the curved shape of a medical capsule 220. That is,
the distal end portion 212A of the hood member 212 has on its inner
circumferential surface a curved surface portion 212G which
corresponds to a part of the sphere of a medical capsule 220. Thus,
when a medical capsule 220 is attracted to and held by the distal
end portion 212A, the closeness between the medical capsule 220 and
the distal end portion 212A of the hood member 212 is increased, so
that the medical capsule 220 can be more reliably held.
A hood member 214 shown in FIG. 13 includes a distal end portion
214A having an inner circumferential surface which has a taper 214H
to provide a holding section. Thus, when a medical capsule 220 is
attracted to and held by the distal end portion 214A, the taper
214H contacts with the curved portion of the medical capsule 220,
which increases closeness between the hood member 214 and the
medical capsule 220, so that the medical capsule 220 can be more
reliably held.
A hood member 216 shown in FIGS. 14 and 15 includes a distal end
portion 216A which is provided with a circular groove 216I. The
side of a medical capsule 220 is pulled into the groove 216I to be
held, so that the medical capsule 220 can be reliably held.
The above embodiment has been explained by an example in which a
medical capsule 220 in a body cavity is held to be collected at
outside of the body cavity, but the embodiment may be used in an
application to transport a held medical capsule 220 through a body
cavity. For example, when a medical capsule 220 is stuck at a
narrowed portion of a body cavity, the held medical capsule 220 is
transported beyond the narrowed portion, and is released. A release
of a medical capsule 220 is performed by controlling the suction
button 30 of FIG. 1 to stop a sucking operation through the forceps
port 58.
The embodiment may be also used in an application to transport a
medical capsule 220 into a body cavity by inserting the inserting
section 12 into the body cavity after a medical capsule 220 is held
by the inserting section 12 at the outside of the body cavity.
The above embodiment has been explained as an example in which the
present invention is applied to a double balloon endoscopic
apparatus having a first balloon 60 and a second balloon 80, but a
configuration of an endoscopic apparatus according to the present
invention is not limited to this, and the present invention may be
applied to an endoscopic apparatus without a first balloon 60 and a
second balloon 80, or an endoscopic apparatus without an insertion
assisting tool 70. That is, a hood member 200 is attached to a
distal end portion 44 of an inserting section 12 of an endoscope
10, and the inside of the hood member 200 is made vacuum through a
forceps port 58 to attract a medical capsule 220 to the distal end
of the hood member 200 so that the medical capsule 220 can be
reliably held for its collection or transportation.
* * * * *